Hand-stamp



(No Model.)

B. 1). CHAMBERLAIN HAND STAMP.

No. 413,027. Patented Oct. 15, 1889.

JLW 6 I W 1| In I mun J I Q WITNESSES O ll I INVENTOR awmfi erhw I I .Aftm'mq bon-roll.

UNITED STATES PATENT OFFICE."

EDMUND D. CHAMBERLAIN, OF WESTFIELD, NEWV JERSEY.

HAN D-STAM P.

SPECIFICATION forming part of Letters Patent No. 413,027, dated October 15, 1889.

Serial No. 279,610. (No model.)

To all whom it may concern..-

Be it known that I, EDMUND D. CHAMBER- LAIN, a citizen of the United States, residing at Westfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Hand- Stamps, of which the following is a full and clear description,reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 represents a perspective view of a hand-stamp embodying my invention, and showing the pawls engaging the ratchet on the rear ribbon-roll. Fig. 2 isaside elevation of the same, showing the reversible pawls in engagement with the ratchet on the rear rib- Fig. 3 illustrates a modified form of mechanism for actuating the ribbon.

The present invention. relates to certain new and useful improvements in handstamps. It is an improvement on my former patent, No. 17 6,837 granted to me May 2, 1876; and it consists in combining with the ribbon-rolls a plural number of double-acting pawls, which are adapted to engage ratchetwheels or similar devices on the ribbon-rolls, whereby the ribbon may be automatically wound upon either roll by the simple changing of the pawlsfrom' the ratchet-wheels on one roll to that on the other roll, as I shall hereinafter fully describe and claim.

To enable others skilled in the art to make and use my invention, Iwill now describe the same and indicate the manner in which I carry it out.

In the said drawings,Arepresents the body or casing of the stamp, having mounted between its sides the ribbon-rolls a a, upon which the ribbon Bis alternately wound, said casing having also secured to it in any suitable manner any well-known form of dating or numbering die. The armD of the stamp is of any Well-known construction, and is pivoted to the rear of the casing, and said arm is provided with a downwardly-projecting short arm b, the lower end of which is pivotally secured to a bar 0, having near its front end a slot d, through which a stud or pin a, projecting from the casing, passes, whereby said bar is supported and permitted to have a longitudinally reciprocating movement caused by the movement of the short arm b when the pivoted arm D is operated to make the impression. The shafts of the ribbon-rolls a a project through one side of by a pawl upon the projecting short arm of the main pivoted arm, a second fixed pawl being employed to hold the ratchet after it had been moved by the movable pawl. When such a, construction was used, the ribbon would be wound upon the rear roll by the ratchet and pawl, but could only be unwound therefrom, and upon the other roll, by turn ing the latter with the fingers. This operation consumed time, and the construction was objectionable for other reasons. Therefore, to overcome these defects, I have designed a stamp in which the movement of the main arm may beinstantly transferred from one ribbonroll to the other to change the direction of the travelof the inking ribbon. The mechan ism preferably employed to carry out this im portant result consists of a pawl E, which is pivoted upon the front end of the longitudinallymoving bar 0, so that its free end may be thrown from one ratchet wheel to the other without difficulty or the expenditure'of time, the said pawl carrying at its free end.

engaging-points Z m, one of which engages the ratchet-wheel g to move the ribbon in one direction, while the other point engages the ratchet-wheel g to move said ribbon in the opposite direction. Another pawl F is pivoted upon the fixed stud projecting from the casing A, and its free end is also provided with two engaging-surfaces n 0, which are adapted to engage the ratchet-wheels and hold them during the period the movable pawl E is moving from one tooth to another.

To make this portion of myinvention more plain, I will refer to Fig. 2, where the pawls E and F are shown in engagement with the ratchet-wheel on the ribbon-roll a, in which case the ribbon will be-wound upon the roll a by the combined action of the pivoted arm D, the longitudinally moving balyand the accomplish the desired result by simply throwing the two pawls from their engagement with the ratchet on the roll a onto the ratchet on the other roll a, in which position, (see Fig. 1,) when the arm D is again operated, its movement is co1n1nunicated,through the longitudinally-moving bar and the pawl E, directly to the roll a, which is thus rotated to cause the ribbon to travel in a direction the reverse of what it did when the pawls engaged the ratchet on the roll a. In other words, the ribbon is now wound upon the roll at until it is desired to again return it to the roll a, which may readily be done by again throwing the pawls into engagement with the ratchet wheel thereon.

I do not wish to confine myself to any particular mechanism for actuating the ribbonrolls and ribbon, for it is obvious many mechanisms may be employed to accomplish the same purpose, the principal object in all cases being to actuate the ribbon by a plural number of ratchet-wheels in such a manner that one ratchet-wheel or set may be engaged .and operated to move the ribbon in one direction, while the other ratchet-wheel or set remains idle, and yet so locate the ratchetwheels that they may be readily engaged by suitable pawls to transfer the movement of .the upper arm of the stamp to said wheels and cause the ribbon to move in the desired direction.

In Fig. 3 I illustrate a modification for accomplishing the desired result, the construction therein shown consisting of an arm WV, connected with the'pivoted arm D, and having formed on its front end a pawl adapted for engagement with. one of the ratchetwheels. An adj usti-ng-screw X or equivalent device passes through the arm W and bears upon a spring-plate. secured at one end to the arm "W, and having its opposite end adapted to engage the other ratchet-wheel, as shown. It will be observed from this description that when the spring-plate V is in engagement with its ratchet-wheel g the pawl end of the arm WV is held up out of engagement with its ratchet 9, whereby when the arm D is actuated its movement is transmitted to the ratchet-wheel g, which is thereby rotated to wind the ribbon on its roll a. WVhen the screw X is adjusted to permit the spring-plate V to release itself from engagement with its ratchet, the front end of the arm W is permitted to drop into engagement with the ratchet g, so that when the pivoted arm D is again moved the ratchet g is rotated to move the ribbon in a direction opposite to that previously described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is'

1. In a hand stamp, the combination, with the casing, the pivoted arm D, the inkingribbon, and the rolls upon which it is wound, of a plural number of double-acting pawls, one of said pawls being connected with and actuated by the pivoted arm of the stamp, and both'pawls being adapted to be thrown from engagement with one roll to another, whereby the inking-ribbon is alternately and automatically wound upon the rolls,- substantially as described.

2. The combinatio n, with a hand-stamp having a pivoted arm, an inking-ribbon, and rolls upon which the latter is wound, of a longitudinally moving bar connected with and operated by said pivoted arm, a double-acting pawl carried by said arm, and a second double-acting retaining-pawl, said pawls being adapted'for engagement with the inkingribbon rolls, whereby the direction of travel of the inking-ribbon may be automatically changed and the said ribbon wound upon either roll, substantially as described.

3. The casing, the pivoted arm having a short-arm extension, the inking-ribbon, the rolls for the same, and a ratchet-wheel on the axis of eachroll, in combination with the pivoted longitudinally-moving bar actuated by the pivoted arm, a double-acting pawl pivoted thereto and adapted to be thrown alternately into engagement with the ratchetwheels, andasecond double-acting retainingpawl pivoted upon a stud projecting from the casing and adapted for engagement with both ratchets, whereby the inking-ribbon may be wound upon either roll by the movement of the pivoted arm and pawls, substantially as described.

EDMUND D. CHAMBERLAIN.

\Vitnesses:

FREDRICK DERKEN, L. M. WHITAKER. 

